Let n(A) = m and n(B) = n. Then the total number of non-empty relations that can be defined from
A to B is (a) mn (b) nm − 1 (c) mn − 1 (d) 2mn − 1
Static resistance = V/I = 1/ tan(theta) ....how has this relation come ..I just wanted to know where did the relation between tan(theta) come from ?